| Patents for E21B 34 - Valve arrangements for boreholes or wells (14,685) |
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| 08/08/2013 | US20130203259 Pressure control valve assembly of plasma processing chamber and rapid alternating process |
| 08/08/2013 | US20130199797 Fluid injection device |
| 08/08/2013 | US20130199796 Fluid injection device |
| 08/08/2013 | US20130199795 Exercising a Well Tool |
| 08/08/2013 | US20130199794 Gas Lift System Having Expandable Velocity String |
| 08/08/2013 | US20130199791 Deep set subsurface safety system |
| 08/08/2013 | US20130199790 Wireline conveyed apparatus for wellbore fluid treatment |
| 08/07/2013 | CN203114257U Liquid inlet regulating and controlling valve under single pressure |
| 08/07/2013 | CN203114246U Stratigraphic isolating valve of oil-water well |
| 08/07/2013 | CN203114245U Primary switching valve under shaft |
| 08/07/2013 | CN203114244U Primary shear pin type standby vent valve |
| 08/07/2013 | CN203114243U Check valve for embedded sleeve pipe |
| 08/07/2013 | CN203114242U Pressure automatic starting valve |
| 08/07/2013 | CN103233700A Ball screw gate valve |
| 08/06/2013 | US8499826 Intelligent pressure actuated release tool |
| 08/06/2013 | CA2692686C Producing resources using heated fluid injection |
| 08/01/2013 | WO2013112267A1 Tubular anchoring system and a seat for use in the same |
| 08/01/2013 | WO2013112266A1 Tubular anchoring system and method |
| 08/01/2013 | WO2013112261A1 Dirty fluid valve with chevron seal |
| 08/01/2013 | WO2013110197A1 Core barrel valve assembly |
| 08/01/2013 | WO2013110180A1 Downhole valve and latching mechanism |
| 08/01/2013 | WO2013110160A1 Core barrel valve assembly |
| 08/01/2013 | US20130192852 Valve assembly |
| 08/01/2013 | US20130192849 Method and apparatus for releasing gas pressure from a drill string |
| 08/01/2013 | US20130192848 Completions assembly with extendable shifting tool |
| 08/01/2013 | US20130192846 Resettable Ball Seat |
| 08/01/2013 | US20130192833 Opening or closing a fluid flow path using a material that expands or contracts via a change in temperature |
| 08/01/2013 | US20130192823 Systems, methods, and devices for monitoring wellbore conditions |
| 08/01/2013 | CA2861963A1 Core barrel valve assembly |
| 08/01/2013 | CA2861820A1 Tubular anchoring system and a seat for use in the same |
| 08/01/2013 | CA2861818A1 Tubular anchoring system and method |
| 07/31/2013 | EP2620586A2 Resettable ball seat |
| 07/31/2013 | EP2619405A1 Apparatus and method for fluid treatment of a well |
| 07/31/2013 | EP2619404A1 Wellbore frac tool with inflow control |
| 07/31/2013 | EP2619403A1 Delayed opening wellbore tubular port closure |
| 07/31/2013 | EP2619402A2 Remotely operated isolation valve |
| 07/31/2013 | EP2619401A2 Signal operated isolation valve |
| 07/31/2013 | CN203097857U Three-level underground hydraulic control pressure reducing valve |
| 07/31/2013 | CN203097823U Electronic-control oil draining device |
| 07/31/2013 | CN203097822U Concealed type bellows gaslift valve |
| 07/31/2013 | CN203097821U Anti-blocking pressure leveling switch of water injection tubular column |
| 07/31/2013 | CN203097820U Releasing mechanism and inner blowout preventer including same |
| 07/31/2013 | CN203097819U Adjustable anti-blocking pressure-relief lubricating nipple with various diameters |
| 07/31/2013 | CN203097818U Water injection cross |
| 07/31/2013 | CN203097817U Hydraulic-driven plug device of power faucet |
| 07/31/2013 | CN203097795U Three-layer concentric water injection wellhead |
| 07/31/2013 | CN203097716U Combined drill column device for drilling of directional well |
| 07/31/2013 | CN103228863A Downhole punch component |
| 07/31/2013 | CN103225493A Backflow preventing device for well cementation |
| 07/30/2013 | US8496059 Controlling flow of steam into and/or out of a wellbore |
| 07/30/2013 | CA2612285C Novel activating mechanism for controlling the operation of a downhole tool |
| 07/27/2013 | CA2803212A1 Series configured variable flow restrictors for use in a subterranean well |
| 07/27/2013 | CA2797457A1 Resettable ball seat |
| 07/26/2013 | CA2766006A1 Method and apparatus for releasing gas pressure from a drill string |
| 07/25/2013 | WO2013109636A1 Hydraulic shock absorber for sliding sleeves |
| 07/25/2013 | WO2013109287A1 Subterranean well interventionless flow restrictor bypass system |
| 07/25/2013 | WO2013109285A1 Pressure pulse-initiated flow restrictor bypass system |
| 07/25/2013 | WO2013109248A1 Methods of isolating annular areas formed by multiple casing strings in a well |
| 07/25/2013 | WO2012125254A3 Pressure regulator with improved deadband |
| 07/25/2013 | US20130186639 Pressure pulse-initiated flow restrictor bypass system |
| 07/25/2013 | US20130186635 Hydraulic Shock Absorber for Sliding Sleeves |
| 07/25/2013 | US20130186634 Downhole Fluid Flow Control System Having a Fluidic Module with a Bridge Network and Method for Use of Same |
| 07/25/2013 | US20130186633 Counter device for selectively catching plugs |
| 07/25/2013 | US20130186626 Subterranean well interventionless flow restrictor bypass system |
| 07/25/2013 | CA2828848A1 Steam splitter |
| 07/24/2013 | EP2616630A2 Method and apparatus for precise control of wellbore fluid flow |
| 07/24/2013 | CN203081438U Mechanical oil recovery well opening sampler |
| 07/24/2013 | CN203081407U Gas production tree of gas well |
| 07/24/2013 | CN203081402U Double-sealing downhole sleeve gas control valve |
| 07/24/2013 | CN203081401U Manual-hydraulic drive flat valve |
| 07/24/2013 | CN203081400U Double-seal flowback preventing check valve |
| 07/24/2013 | CN203081399U Deflation valve of sleeve |
| 07/24/2013 | CN103221634A Clustered wellhead trunkline protection and testing system with ESP speed controller and emergency isolation valve |
| 07/24/2013 | CN103216213A Underground annular control valve |
| 07/24/2013 | CN103216212A Sand control bypass valve of screw drill |
| 07/24/2013 | CN101484661B Hydraulic metering valve for operation of downhole tools |
| 07/23/2013 | US8490720 Self aligning mud saver valve seat |
| 07/23/2013 | US8490705 Hydraulic control system monitoring apparatus and method |
| 07/23/2013 | US8490704 Technique of fracturing with selective stream injection |
| 07/23/2013 | US8490687 Safety valve with provisions for powering an insert safety valve |
| 07/18/2013 | WO2013106843A1 Density based mechanical valve control system |
| 07/18/2013 | WO2013106615A2 Wellbore pressure actuation of downhole valves |
| 07/18/2013 | WO2013106162A1 Inflow control device with adjustable orifice and production string having the same |
| 07/18/2013 | WO2012140200A3 Downhole fast-acting shut-in valve system |
| 07/18/2013 | WO2012097010A3 Subsea retrievable insert with choke valve and non return valve |
| 07/18/2013 | WO2012040235A3 Remotely operated isolation valve |
| 07/18/2013 | US20130180727 Method and apparatus for autonomous downhole fluid selection with pathway dependent resistance system |
| 07/18/2013 | US20130180724 Inflow control device with adjustable orifice and production string having the same |
| 07/18/2013 | US20130180721 Downhole Fluid Treatment Tool |
| 07/18/2013 | US20130180718 Method and apparatus for wellbore fluid treatment |
| 07/18/2013 | US20130180711 Wellbore Pressure Actuation of Downhole Valves |
| 07/17/2013 | EP2615241A2 High strength dissolvable structures for use in a subterranean well |
| 07/17/2013 | EP2614215A2 Series configured variable flow restrictors for use in a subtrerranean well |
| 07/17/2013 | CN203066930U Solar energy powered control system for wellhead safety valve |
| 07/17/2013 | CN203066929U Reflux resistant valve for mine slip casting |
| 07/17/2013 | CN203066928U Reverse constant-pressure start-up standing valve |
| 07/17/2013 | CN103210177A Autonomous cut-off device |
| 07/17/2013 | CN103210176A Remotely controlled apparatus for downhole applications, components for such apparatus, remote status indication devices for such apparatus, and related methods |
| 07/17/2013 | CN103210169A Status indicators for use in earth-boring tools having expandable members and methods of making and using such status indicators and earth-boring tools |
| 07/16/2013 | US8485499 Drive device |